projects / J-u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 44482e8a SG |
1 | // SPDX-License-Identifier: GPL-2.0+ |
| 2 | /* | |
| 3 | * UART support for U-Boot when launched from Coreboot | |
| 4 | * | |
| 5 | * Copyright 2019 Google LLC | |
| 6 | */ | |
| 7 | ||
| 8 | #include <common.h> | |
| 9 | #include <dm.h> | |
| 10 | #include <ns16550.h> | |
| 11 | #include <serial.h> | |
| 12 | #include <asm/arch/sysinfo.h> | |
| 13 | ||
| 14 | static int coreboot_ofdata_to_platdata(struct udevice *dev) | |
| 15 | { | |
| 16 | struct ns16550_platdata *plat = dev_get_platdata(dev); | |
| 17 | struct cb_serial *cb_info = lib_sysinfo.serial; | |
| 18 | ||
| 19 | plat->base = cb_info->baseaddr; | |
| 20 | plat->reg_shift = cb_info->regwidth == 4 ? 2 : 0; | |
| 21 | plat->reg_width = cb_info->regwidth; | |
| 22 | plat->clock = cb_info->input_hertz; | |
| 23 | plat->fcr = UART_FCR_DEFVAL; | |
| 24 | plat->flags = 0; | |
| 25 | if (cb_info->type == CB_SERIAL_TYPE_IO_MAPPED) | |
| 26 | plat->flags |= NS16550_FLAG_IO; | |
| 27 | ||
| 28 | return 0; | |
| 29 | } | |
| 30 | ||
| 31 | static const struct udevice_id coreboot_serial_ids[] = { | |
| 32 | { .compatible = "coreboot-serial" }, | |
| 33 | { }, | |
| 34 | }; | |
| 35 | ||
| 36 | U_BOOT_DRIVER(coreboot_uart) = { | |
| 37 | .name = "coreboot_uart", | |
| 38 | .id = UCLASS_SERIAL, | |
| 39 | .of_match = coreboot_serial_ids, | |
| 41575d8e | 40 | .priv_auto = sizeof(struct NS16550), |
| caa4daa2 | 41 | .plat_auto = sizeof(struct ns16550_platdata), |
| 44482e8a SG |
42 | .ofdata_to_platdata = coreboot_ofdata_to_platdata, |
| 43 | .probe = ns16550_serial_probe, | |
| 44 | .ops = &ns16550_serial_ops, | |
| 45 | .flags = DM_FLAG_PRE_RELOC, | |
| 46 | }; |